Amplifier



June 9, 11925.

G. ENGLER AMPLIFIER Filed Aug. 26. 1922 VENTOR ATTORNEY Patented June 9, 1925.

UNITED STATES PATENT OFFICE.

eosravr. anem a, or NEW YORK, N, v.

AMPLIFIER.

Application filed August 26, 1922. Serial No. 584,484.

T all whom 'z't. may concern:

Be it'known that I, GUSTAVE ENGLEB, a citizen of the United States, residing at New York, in the county of New York and Stateof New York, have invented new and useful Improvements in Amplifiers, of which the following is a specification.

This invention relates to the class of acoustics generally.

An object of the invention is to provide a sound amplifier for use in connection with wireless equipment, graphophones, or similar sound producing transmitting and receiving instruments.

An important object of the invention is action and for conveying the vibrations-from said member to a second vibrating member, the conveying means being such as to. accelerate the action of the second member and produce sound of great magnitude, and the provision of a conveying means which shall be adjustable so as to synchronize the action of both members and to tune the same with proper respect to each other so that articulate speech and musical sounds will be clear and natural-like when delivered from the instrument.

\Vith the above and other objects in view which will appear as the nature of the in- ;vcntion is better understood, the same con-- sists in the improved construction and novel arrangements of parts which will hereinafter be fully described and particularly pointed out in the claims.

In the accompanying drawings, has been illustrated, a single and preferred form of the invention, it being, however, understood that no limitations are necessarily made to the precisestructural details therein exhibited, but that changes, alterations'and modifications within the scope of the claims may be resorted to when desired.

Figure 1, is a longitudinal section through a portion of a receiving instrument showing the invention incorporated therein, parts being shown in elevation.

Figure 2, is a transverse section taken on line 22 of Figure 1.

As stated my invention is not to be limited in its use to' any particular form of instrument' and whenever I use the term receiver, it is for illustration only and in order that one mode of using the invention may be clearly understood.

The receiver 5 herein illustrated, is provided with a diaphragm or yibratory member 6' adapted to be vibrated in the well known manner by the action of an electromagnet 7 positioned at one side of the diaphragm as clearly shown in Figure 1. Located in suitable spaced relation to the diaphragm 6 is a similar diaphragm or vibratory member 8.' As stated, in the objects of my invention, it is my purpose to relate the two diaphragms 6 and 8 and connect them together so that pulsations set up in the diaphragm 6 will be conveyed or transmitted to the diaphragm 8 in a greatly accelerated form so thata clear sound of great magnitude results from use of the instrument.

In order to properly transfer the vibrationsor pulsations from the diaphragm 6 to aforesaid diaphragm'8, I employ means 9 consisting of a power multiplying lever formed preferably of springy steel and provided with an arm 10 having a collar 11 adjustable lengthwise thereof and adapted to be secured in its position of adjustment by means of a set screw 12. This collar is provided with diametrically disposed fulcrum pins 13 which are freely seated in the step bearings 14 in a bracket 15. The bracket '15 is provided with arms 16 which are adjustable in the extremities 17 of posts 18 which extend from the adjacent walls of the transmitter 5. These posts are provided with set screws 19 engageable against the arms 16 so as to hold the bracket in its position of adjustment. In thismanner it will be observed that when the set screws 19 are loosened with respect -to the arms 16 and the screw 12 loosened with respect to the arm 10 of the multiplying lever 9, the sleevell can be moved in the length of the arm for the purpose of obtaining fineness of adjustment in causing the lever to act relatively of the diaphragms 6 and 8 and in tuning the instrument.

The arm 10 is provided at one end with a spring loop 20 whose branch or terminal I to the diaphragm 8 through the agency of the multiplying lever. By shifting the position of the collar 11 upon the arm 10, the throw of the upper or long end of the lever may be regulated so as to cause saidpulsa-- tions to be taken into the diaphragm 8 in a greatly accelerated or augmented manner.

While I have shown and described two diaphragms, coupled together by a multi plying lever, so that vibrations in one diaphragm may be taken into the other 'dia-' phragm and distributed therefrom. in an accelerated manner, it shall be understood that I do not wish to limit myself with respect to the number of diaphragms. I further do not wish to limit myself to the manner of adjusting the fulcrum point of the arm 10 of my multiplying lever. Any suitable well known ad usting means can be provided for this purpose.

While I have described what I deem to be the most desirable embodiment of my invention, it is obvious that man of thedetails may be varied without in any way departing from the spirit of my invention, and I therefore do not limit myself to the exact details of construction herein set forth nor to anything less than the whole of my invention, limited only by the appended claims.

I claim 1. A sound amplifier comprising a plurality of spaced diaphragms, and means for transferring pulsations from one of said diaphragms to the other of the diaphragms and for accelerating the action of the pulsations against the latter, said means including lever arms having operative connection with both diaphragms, and means for changing the relative lengths of said lever arms.

2. A sound amplifier comprising a. plurality of spaced diaphragms, andlever means actuated by one diaphragm and connected with another of said diaphragms for transferring pulsations to the latter from the former, and means for changing the'relative-lengths of said-lever arms.

3. A sound amplifier comprising a plurality of spaced diaphragms, and a rocking lever having its terminals'respectively connected to both diaphragms, and means for changing the relative lengths of said lever arms. I

4. A sound amplifier comprising a plurality of spaced diaphragms, a rocking lever having its terminals respectively connected to both diaphragms and an ad'ustable fulcrum associated with the lever gor changing the lengths of the terminals.

5. A sound amplifier comprising a plurality of spaced diaphragms, and a lever having looped extremities. respectively secured to both diaphragms.

6. In means for accelerating the vibrations of a diaphragm, a rocking lever, and a diaphragm associated with-one end of the lever, thefopposite end of the lever adapted for connection with a second'diaphragm so that vibrations may be transmitted thereto through the lever from the first diaphragm, and means for changing the relative lengths of said rocking lever.

7. An instrument of the character described comprising a vibratory member, a second Vibratory member, and a lever having sprin portions respectively connected to both 0 said members, and means for changing the relative lengths of said spriniy portions. V

8. n instrument of the character described including a rocking lever, portions formed on the lever and adapted for fixed connection with spaced vibratory members and means for shifting the fulcrum point of the lever to change the relative lengths of said portions. v

In testimony whereof I have afiixed my signature.

GUSTAVE ENGLER. 

